Quality problem in desktop extended mode

Hi guys …
I have a problem with dual monitor extended …
both monitor are lg 23mp65 but and i used a hdmi cable for one of them and the other has DVI to VGA converter and using VGA cable to connect …
but the VGA connected monitor has better quality no matter which one is using VGA both settings are same i tested with both monitor…
but the hdmi connected has lower quality than VGA you can see in picture was taken with my phone for better understanding … left is HDMI and right is DVI to VGA …

VGA : Gigabyte GTX970 WF3

&stc=1&d=1429549849

nobody can help me ?

this is a common thing when using different display connectors. only way to stop it is to use all VGA,DVI,HDMI or display ports, this is a colorspace issue, the one on the left looks like its useing 16-235(limited RGB) and the one on the right is 0-255(full RGB). look in your driver settings and see if you can change the hdmi to 0-255